Valve for internal-combustion engines.



H. D. BRODE.

VALVE FOR lNTERNAL COMBUS'HON ENG\NES. APPLlcATmN HLED MAY a. ma.

1,145,898. Patented July 6, 1915.

COLUMBIA PLANDORAPH c0..WAmNuTON D c ,UNITED STATES PATENT OFFIQE.

HUGO DOUGLAS BRODIE,

VALVE FOR INTERNAL-COMBUSTION ENGINES. y

Application led May 8, 1913. SerialANo. 766,409.

To all whom t may concern Be it known that I, HUGO DoUeLAs Broma, a subject of the King of the United Kingdom of Great Britain and Ireland, and resident of Southpark, Biggar, Scotland, gentleman, have invented certain new and useful Improvements in Valves for Internal- Combustion Engines, of which the following is a specification.

This invention relates to valves for internal combustion engines, and more particularly to rotary vdisk valves having a hol. low space therein for the reception of cooling water.

We are aware that in connection with solid rotary disk valves it has been heretofore proposed to provide, on the valve spin* dle, a suitable spring for holding the valve against its seat and to provide between such spring and the stationary casing or cylinderI an anti-friction ball-race.

' Under the present invention, which has for its object to improve the construction of valves of the above type, the valve is made with a hollow space therein for cooling' water, or for heating fluid for use in superheating fuel, and a suitable springl on the valve spindle is adapted to vhold the valve in engagement with its seat while a ball race is interposed between such spring and the sta tionary casing or cylinder of the engine. v

In order that the invention may be clearly understood I have hereunto appended an explanatory drawing .whereon I have shown by way of illustration or example one convenient mode of carrying out the invention.

0n the drawing above referred to Figure 1 is a vertical section of part of a singlecylinder internal combustion engine. Fig. 2 is a horizontal section taken on the line 4:, 4C, Fig. l. v

In the internal combustion engine, part of which is shown on the drawings, a cylinder a is provided with a cooling jacket al and the cylinder head b has a water space o1 foi` cooling the end of the cylinder. rIhe cylinder head b is made with passages c, d, for the admission and exhaust, these passages communicating by means of ports c1, all, respectively with the cylinder (see Fig. 2). Adapted to work on the face of the cylinder end in such manner as to cover and uncover such parts as required is a valve e (see Fig. l) having a tubular stem or spindle el which extends through a cylindrical or tubular portion b2 in the cylinder head and is free Speccation of Letters Patent.

'made'hollow so as to be capable of receiving or Bree/AR, SCOTLAND.

Patented July 6, 1915.

to rotate therein. rlhe outer end of this tubular stem el is squared or made of hexagonal` forni at e2 so as to receive a pinion or worm wheel f similarly made for the reception of- 6 such end e2.. Located between this wheel f and the cylinder head is a ball race con-y sisting of a stationary ring g andV a rotary ring g1 between which a series of balls g2 arev placed so as to run in grooves in such rings. `'Ilhe rotary `ring g1 is made with an annular recess or groove g3 in which is arranged a spiral spring gt which bears also against the wheel f so that the valve e isl heldv firmly against the face of the cylinder end by the action of such spring.

The valve e'is of mushroom shape andv isV cooling water. The valve is also made with a passage c3 capable vof registering with the ports c1, d1, so as to open the cylinder to supply and to exhaust. For supplying cooling water to the interior of the valve e, a pipe z, extends into the interior of the tubular'stem e1 and communicates also with a radiator or other water or fluid supply. The inner end of this pipe h is made with a flange 72,1, and at the outer end of the tubular stem el a packing gland 7a2 is provided, this gland beingscrewed into the outer end of the tubular stem e1 vin such manner that asbestos string or other like packing material 7a4 may be tightly packed between the stem e1 and the pipe t so as to insure a water Y tight joint. The gland h2 is secured` by means of a locking nut 71.? which also serves to retain the wheel f on the end of the tubular stem e1.-

Referring particularly to Fig. 1 of the drawings the sparking plug forthe ignition of the charge is fitted in the opening i at the head of the cylinder, and located between the valve and the piston is a guard 7c adapted to prevent the valve falling into the cylinder in the event of the former breaking or working loose through any cause whatever. This guard lo which is secured in place in any suitable manner is arranged close up to the valve and has an opening 701 in line with each of the openings c1, d1, in the end of the cylinder while another opening 742 is provided to permit of the charge having vfree access to the sparking plug.

If desired the valve may, instead of being water cooled, be suitably heated by means of any convenient Huid so as to super-heat the fuel.

iio

Claims: 1 l. A rotary valve for internal combusion engines comprising a valve casing coni tituting the cylinder end and having admission and exhaust ports, a spark plug opening and a central seat; a mushroom shaped valve with a hollow head and stem, said valve head being provided With a passage in axial direction "for connecting the combustion chamber with one or the other of said ports When the valve is rotated; said valve stein extending axially through said casing and having a driving pinion secured to its i'iree end, a packing gland around said stein, a spring around said stein acting between said pinion and said casing for pressing the valve head tight against its seat.

2. A rotary valve for internal combustion engines comprising a valve casing constituting the cylinder end and having admission and exhaust ports therein, a spark plug opening and a central seat; a mushroom shaped valve with a hollow head and stem, said valve head being provided with a passage in axial direction for connecting the combustion chamber with one or the other of said ports When the valve is rotated; said valve stem extending axially through said casing and having a driving pinion secured to its free end, a spring around said stem acting upon said pinion for pressing the valve head tight against its seat, a ball race around said stem and adjacent said spring for permitting easy running of said mushroom shaped valve and a loose ring interposed between such spring and ball race.

8. A rot-ary valve for internal combustion engines comprising a valve casing constituting the cylinder end and having admission and exhaust ports, a spark plug opening and a central seat; a mushroom shaped valve With a holloiv head and stem, said valve head being provided With a passage in axial direction for connecting the combustion chamber with one or the other of said ports when the valve is rotated; said valve stein extending axially through said casing and having a driving pinion secured to its free end.

l. A rotary valve for internal combustion engines Comprising a valve Casing Constituting the cylinder end and having admission and exhaust ports, a spark plug opening and a central seat; a mushroom shaped valve with a hollou7 head and stem, said valve head being provided With a passage in axial direction for connecting the combustion chamber With one or the other of said ports When the valve is rotated; said valve stein f# extending axially through said casing and having a driving pinion secured to its free end; a packing gland around said stem and -a locking nut ior securing the gland and JAMES AikiiN, lWILLIAM HAYNES.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

